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Superconducting Terahertz Device 2020
(STD20)
James Watt School of Engineering
University of Glasgow
Glasgow, UK
Friday 21st August 2020
The Superconducting Terahertz Device 2020 (STD20) workshop brings together the leading scientists in high-Tc superconductivity to discuss the latest advances in superconducting terahertz (THz) components and systems based on intrinsic Josephson junctions, to help shape the future of such THz devices in spectroscopy, imaging, tomography, communication and quantum technology. • Plenary Speakers Kazuo Kadowaki, University of Tsukuba, Japan Fedor Kusmartsev (InstP, HEA and APS Fellow), Loughborough University, UK Richard A. Klemm, University of Central Florida, USA Huabing Wang, Nanjing University, China Alexei E. Koshelev (APS Fellow), Argonne National Lab, USA • Invited Speakers Yury Shukrinov, Bogoliubov Laboratory, Moscow, Russia Itsuhiro Kakeya, Kyoto University, Japan Takanari Kashiwagi, University of Tsukuba, Japan Timothy Benseman, CUNY Queens College, USA • Organiser Kaveh Delfanazari, University of Glasgow, UK
Programme
Workshop on Superconducting Terahertz Device 2020
Friday 21st August 2020 12:50 – 17:30
STD20 Workshop Zoom Link: https://uofglasgow.zoom.us/j/92185074687
Note:
-The time indicates British Standard Time (GMT+1).
-If you have any difficulty in accessing the technical session, please go to the main
UCET conference Zoom link to get support.
Time Paper Title Authors
12:50 STD 2020 Opening Kaveh Delfanazari & Kazuo Kadowaki
Recent Advances in THz Emission from
13:00 Kazuo Kadowaki
High- Tc Superconducting IJJ Mesa Structure
The Terahertz Device from hybrids of
13:30 Fedor Kusmartsev
superconductors and topological materials
Evaluation of terahertz emission from Huabing Wang, Valery Koshelets,
14:00
intrinsic Josephson junction stacks Reinhold Kleiner, & Peiheng Wu
Mutual Synchronization of Terahertz Ken Hayama, Shuma Fujita, Yuya
14:30 Emissions from Multiple Intrinsic Josephson Kuriyama, Keiichiro Maeda, Manabu
Junction Mesas Tsujimoto, & Itsuhiro Kakeya
14:50 / /
Terahertz Emission from Thin Annular and Richard A Klemm, Nahi Shouk, Sheila
15:10
Slitted Annular Bi2212 Microstrip Antennas Bonnough, Ruqayyah Shouk
Competing steady states in intrinsic Alexei E. Koshelev, Dusan Stosic,
15:40
Josephson junctions Darko Stosic
16:10 Development of Bi2212-THz emitter Takanari Kashiwagi
Yury Shukrinov, Ilhom Rahmonov,
Magnetization Dynamics Features in the SFS
16:30 Andre E. Botha, Andrej Plecenik,
Josephson Junction
Dragos Angel
Stacked Intrinsic Josephson Junction Timothy M Benseman, Karen
Bi2Sr2CaCu2O8 Terahertz Sources: Design Kihlstrom, Alexei Koshelev, Ulrich
16:50
Issues for Achieving High Power Output Welp, Wai-Kwong Kwok, & Kazuo
Close to Tc Kadowaki
Guiding of Terahertz Photons in Samane Kalhor, Majid
17:10
Superconducting Nano-Circuits Ghanaatshoar, & Kaveh Delfanazari
17:30 STD 2020 Closing Remarks Kaveh Delfanazari
[Talk P1]
Recent Advances in THz Emission from High Tc Superconducting IJJ Mesa
Structure
Kazuo Kadowaki
University of Tsukuba, Japan
Electromagnetic waves at THz frequency can be generated coherently and continuously by using high-
temperature superconductor Bi2Sr2CaCu2O8+δ mesa structure. After more than decade-long research
and development of THz emission from superconductor we now come to a stage to develop THz
emitting devices useful for many applications. I will give a brief summary of such THz emitting devices
for commercial use with high performance.
About the speaker
Kazuo Kadowaki (Member, IEEE) received the Ph.D. degree in physics from
Osaka University, Suita, Japan, in 1980. He worked as a Postdoctoral
position at the Department of Physics, University of Alberta, Edmonton,
AB, Canada, from 1982 to 1986, a Lecturer with the Natuurkundig
Laboratorium der, Universitaeit van Amsterdam, Amsterdam, The
Netherlands, from 1986 to 1990, a Group Leader with the National
Research Institute for Metals, Tokyo, Japan, from 1990 to 1995, and an
Associate Professor with the Institute of Materials Science, University of
Tsukuba, Tsukuba, Japan, in 2005, where he has been a Professor since
2007. He has discovered Kadowaki–Woods law in solid-state physics and
experimentally proved the Josephson plasma waves in layered superconducting BSCCO intrinsic
Josephson junctions (IJJs) for the first time.
[Talk P2]
The Terahertz Device from Hybrids of Superconductors and Topological
Materials
Fedor Kusmartsev
Department of Physics, Loughborough University, UK
In my lecture I am going to speak about unique device which will unlock the illusive terahertz (THz)
wavelengths and make revolutionary new technologies possible on the bases of the novel hybrid
structures[1-3] from topological materials and superconductors [4-6]. Such devices have a simple
structure consisting of graphene or a thin film of topological material(TM) and a superconductor(SC).
As the THz light falls on the proposed TM/SC device it is reflected, and simultaneously is strongly
amplified using the energy supplied by a battery or by pumping light of a higher frequency. The THz
photons are transformed by the TM/SC structure into energised massless electrons, which, in turn,
are transformed back into reflected, energised, THz photons[1]. The TM/SC combination characterized
by quantum capacitance and infinite Berry curvature, can be utilized to make THz devices with huge
sensitivity[3]. For TM layer we may use two-dimensional Dirac materials such as silicene, germanene,
stanene, their heterostructures, as well as arrays of polyacetylene chains and carbon nanotubes,
topological insulators and Weyl semimetals. The new device will allow the harnessing of the illusive
bandwidth and create the next generation of medical testing, drugs and explosive detection, and
wireless communication equipment. There will be a special focus in my lecture on the fast detection
of viruses, including the novel coronavirus, which emit different but weak THz signals.
[1] Physical Review Letters, 124(8), p.087701, (2020), [2] Science Bulletin.
doi:10.1016/j.scib.2020.05.013 (2020), [3] 2D Materials, 6(4). doi:10.1088/2053-1583/ab2ee9 (2019),
[4] Physical Review B, 99(6), p.060501. (2019), [5] Physical Review B, 100(18).
doi:10.1103/PhysRevB.100.184509, [6] Physical review B: Condensed matter and materials physics.
doi:10.1103/PhysRevB.98.064502
About the Speaker
Fedor Kusmartsev (IOP, HEA, and APS Fellow) received his PhD from the
Landau Institute for Theoretical Physics, Russia, in 1983. He is currently
Professor of Condensed Matter Theory, and Vice Head of Physics
Department, at Loughborough University, UK. He was Research Scientist
at the Landau Institute, Moscow (1983), Visiting Professor at Tokyo
University (1993), Visiting Professor at NORDITA (1994), Professor of
Physics at Loughborough University (1996), and Head of Physics
Department at Loughborough University (2001).
[Talk P3]
Evaluation of Terahertz Emission from Intrinsic Josephson Junction Stacks
Huabing Wang,1,2 Valery Koshelets,3 Reinhold Kleiner,4 and Peiheng Wu1, 2
1
Research Institute of Superconductor Electronics, Nanjing University,
Nanjing 210023, China
2
Purple Mountain Laboratories, Nanjing 211111, China
3
Kotel’nikov Institute of Radio Engineering and Electronics, Moscow 125009, Russia
4
Physikalisches Institut and Center for Quantum Science in LISA+, Universitaet Tuebingen, D-72076 Tuebingen,
Germany
Superconducting terahertz (THz) signal sources are very promising in radio astronomy, space
communications, and many other applications. In this talk, we will review our efforts on evaluation of
THz radiation from Bi2Sr2CaCu2O8+δ intrinsic Josephson junction (IJJ) stacks.
At high bias, in the presence of a hot spot, the emission frequency seems to be continuously tunable
by changing the bias current and the bath temperature. By contrast, at low bias the emission
frequencies f are remarkably discrete and temperature independent for both stacks. The total voltage
V across the stack varies much stronger than f, and there seems to be an excess voltage indicating
groups of junctions that are unlocked.
We have developed a self-mixing technique for the purpose of evaluation. We find that at high bias
currents, when a hot spot has formed in the stack, the power level of self-mixing can be low and
sometimes is even absent at the THz emission peak, pointing to a good phase locking among all IJJs.
By contrast, at low bias currents where no hot spot exists, the self-mixing products are pronounced
even if the THz emission peaks are strong. While these observations are helpful for the task to
synchronize thousands of IJJs, the observation of self-mixing in general may offer a simple method in
evaluating the coherence of THz radiation produced by the IJJ stacks.
Using a Nb/AlN/NbN integrated receiver for detection, we carry out measurements of the linewidth
Df of terahertz radiation emitted from intrinsic Josephson stacks. Thanks to the high frequency
resolution, we find at high bias, where a hot spot coexists with regions which are still superconducting,
Df turns out to be as narrow as 23 MHz, while at low bias we find Df to be not smaller than ∼500 MHz.
We attribute this to the hot spot acting as a synchronizing element.
We have also used a high-Tc Josephson junction as a terahertz detector. We couple the terahertz
radiation to an YBa2Cu3O7-d grain boundary Josephson junction mounted on a lens 1.2 cm away. The
emitter radiates at frequencies near 0.5 THz, with a maximum emission power, as detected by a Si
bolometer, of 25 mW. This emission power is strong enough to induce up to 7 Shapiro steps in the
YBCO Josephson junction, indicating the THz emitters are practically useful.
To conclude, with different methods we have evaluated the radiation from the high-Tc
Bi2Sr2CaCu2O8+x intrinsic Josephson junction stacks. With the obtained knowledge, the next step can
be to develop integrated high-Tc receivers and emitters, and find their practical applications.
This work has been done in collaboration with Mengyue Li, Deyue An, Huili Zhang, Ya Huang, Min Ji,
Xianjing Zhou, Hancong Sun, Nickolay Kinev, Takeshi Hatano, Dieter Koelle et al.
We gratefully acknowledge financial support by the National Natural Science Foundation of China
(Grants Nos. 61727805, 11961141002, 61521001, 61771235), the National Key R&D Program of China
(Grant Nos. 2018YFA0209002, 2016YFA0301802), Jiangsu Key Laboratory of Advanced Techniques for
Manipulating Electromagnetic Waves, the Priority Academic Program Development of Jiangsu Higher
Education Institutions (PAPD), the RFBR Grant No. 17-52-12051, EU-FP6-COST Action CA16218 and
the Deutsche Forschungsgemeinschaft via project KL930-13/2.
About the Speaker
Huabing Wang received his B. S. and Ph.D. in Radio Physics from Nanjing
University, China, in 1990 and 1995 respectively. In 1995 he joined the
Department of Electronic Science and Engineering, Nanjing University,
China, as a staff member and was appointed associate professor in 1996.
Since 1997, he was a research fellow of the Japan Science and Technology
Corporation, working in the Research Institute of Electrical
Communication, Tohoku University, Japan, where he was promoted to be
an associate professor in 2001. After visiting the Universitaet Erlangen-
Nuernberg, Germany for one year, he spent two years as an ICYS research
fellow in the National Institute for Materials Science, where he has been
employed as a principal researcher and then chief researcher since 2006.
He is now a full professor in Nanjing University. His research interest is superconductor electronics
(fabrication, characterization, design, and quantum property and nonlinear dynamics of
superconducting electronic devices) and its applications in terahertz and microwave bands.[Talk P4]
Terahertz Emission from Thin Annular and Slitted Annular Bi2212 Microstrip
Antennas
Richard A Klemm1, Nahi Shouk1,2, Sheila Bonnough1, Ruqayyah Shouk1,2
1
Department of Physics University of Central Florida Orlando, USA
2
Jazan University, Saudi Arabia
The transverse magnetic wave functions generated from the intrinsic Josephson junctions in the high-
temperature superconductor Bi2212 are found for annular and singly slitted microstrip antennas.
From the wave functions, the Love equivalence principles are used to generate the emission from the
uniform and cavity modes (wave functions). For most of the annular wave functions, the infinite
degeneracy of the modes with line nodes through the geometric center most likely will result in no
cavity mode enhancement of the output power. Forming the slit breaks that infinite degeneracy into
a double degeneracy of modes that are odd or even about the slit. Pictures of the wave functions and
the uniform and cavity mode contributions to the output power distribution will be shown. The
consequences for forming arrays of such devices will be discussed.
About the Speaker
Richard A. Klemm (Member, IEEE) received the Ph.D. degree in physics
from Harvard University, Cambridge, MA, USA, in 1974. He wrote his
doctoral thesis, Layered Superconductors, on the theory of such
materials in 1974. After a Postdoctoral Fellowship with Stanford
University, Stanford, CA, USA, he spent significant amounts of time with
Iowa State University, Ames, IA, USA, Exxon Research and Engineering
Company, Annandale, NJ, USA, and the Argonne National Laboratory,
Lemont, IL, USA. He is currently a Professor of physics with the University
of Central Florida, Orlando, FL, USA. Prior to entering Graduate School, in
1970, he synthesized the first highly layered superconductor,
TaS2(pyridine)1/2. He is the author of Layered Superconductors (Oxford
University Press, Volume 1, 2012).[Talk P5]
Competing Steady States in Intrinsic Josephson Junctions
Alexei E. Koshelev1, Dusan Stosic2, Darko Stosic2
1
Materials Science Division Argonne National Laboratory Lemont, U.S.A.
2
Centro de Informática, Universidade Federalde Pernambuco, Av. Luiz Freires/n,50670-901, Recife, PE, Brazil
Intrinsic Josephson junctions (IJJs) in high-temperature superconductor Bi2Sr2CaCu2O8+δ (BSCCO)
emerged as a promising platform for the development of coherent and continuous terahertz sources
[1]. THz radiation is generated in the resistive state due to ac Josephson effect. The development of
powerful THz sources depends on reliable preparation of stable coherent states. In large-size mesas,
such states spontaneously emerge from chaotic states near the cavity resonance. This transition is
facilitated by the formation of the dynamic phase kinks [2]. At sufficiently low currents, the system
jumps to a static state. We performed large-scale simulations of phase dynamics in IJJ stacks. We
systematically explored the emergence of coherent states and switching to static state for stack with
different sizes, dissipations, thermal noise, and disorder. We found that the coherent states are
formed only when dissipation exceeds a certain critical value. Below this value, the system switches
directly from the chaotic to static state. The critical dissipation level increases with the stack width. It
is also higher in nonuniform systems. The chaotic and coherent states coexist within a finite current
range and the lifetimes in these states are finite. This means that, for a sufficiently slow current ramp,
the system will randomly jump between these states. In this case, the observable voltage is
determined by the average between the voltages of two states. This mechanism explains smooth
current-voltage characteristics usually observed in experiments on BSCCO mesa structures. It is likely
a key factor limiting the performance of existing devices. We confirmed this scenario by performing
long-time simulations of a small-size system.
The work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences,
Materials Sciences and Engineering Division.
References
[1] U. Welp, K. Kadowaki, and R. Kleiner, Nature Photonics 7, 702 (2013); I. Kakeya and H. B. Wang, Supercond.
Sci. Technol. 29, 073001 (2016). [2] S. Z. Lin and X. Hu, Phys. Rev. Lett., 100, 247006 (2008); A. E. Koshelev, Phys.
Rev. B 78, 174509 (2008).
About the Speaker
Alexei Koshelev (APS Fellow) is a scientist in the Materials Science
Division, Argonne National Laboratory, USA. He received his Ph. D. in 1986
from the Landau Institute of Theoretical Physics (scientific advisor Prof. S.
V. Iordanskii). Until 1991 Dr. Koshelev was working in the Institute of Solid
State Physics (Chernogolovka, Moscow Region, Russia). During 1991-1993
he was visiting Kamerlingh Onnes Laboratory, Leiden, The Netherlands,
where he was developing theory of vortex state in layered
superconductors with Prof. Peter Kes. In Argonne Dr. Koshelev is working
on theory of superconductivity including vortex matter, intrinsic
Josephson junctions, and multiple-band effects.[Talk I1]
Mutual Synchronization of Terahertz Emissions from Multiple Intrinsic
Josephson Junction Mesas
Ken Hayama1, Shuma Fujita1, Yuya Kuriyama1, Keiichiro Maeda1, Manabu Tsujimoto2,
Itsuhiro Kakeya1
1
Department of Electronic Science and Engineering Kyoto University Kyoto, Japan
2
Institute for Materials Science University of Tsukuba Tsukuba, Japan
The authors present direct proof of synchronized macroscopic Josephson oscillations excited in two
intrinsic Josephson junction stacks formed on a Bi2212 single crystal. The strong coupling between the
Josephson oscillations in the two mesas via the base crystal is probed by polarization analysis of
emitted terahertz waves from individually biased mesas and simultaneously biased mesas.
About the Speaker
Itsuhiro Kakeya received a Ph.D degree in June 1998 (Osaka University),
1998-2008: Assistant Professor and Lecturer at University of Tsukuba,
Japan, 2008-present : Associate Professor at Kyoto University, Japan Prof.
Kakeya is an expert in measuring electric and magnetic responses of
superconductors and magnetic materials with a frequency range of 0 –
1012 Hz (DC to THz). In particular, he has an extensively rich experience to
measure nanostructured specimen at low temperatures down to 300 mK.
He has published over 100 research articles, filled 6 patents, and received
7 grants-in-aid from JSPS-KAKENHI as the research leader. Furthermore, he has supervised 3 Ph.D
theses and accepted 1 Postdoc as the leader of his research group since 2013. Research highlight of
him include observation of Josephson plasma resonance in superconductors and demonstration of
the emission of terahertz (THz) electromagnetic wave from superconductors. He has initiated research
on non-linear dynamics of coupled Josephson junctions included in single crystals of cuprate
superconductors with using frequency- and time-domain method. This has led an opportunity to open
a pathway for actual superconducting high-frequency device and understanding microscopic carrier
and phonon dynamics in superconductors.[Talk I2]
Development of Bi2212-THz Emitter
Takanari Kashiwagi
Institute for Materials Science University of Tsukuba Tsukuba, Japan
Since the discovery of continuous, coherent THz radiation from intrinsic Josephson junctions (IJJs)
constructed in the single crystals of Bi2Sr2CaCu2O8+δ in 2007, various types of device structures have
been developed. According to these studies, thermal management of Joule heat of the IJJ mesa device
is an important issue to improve the device characteristics. By using a thermal managed device
structure with stand alone type of mesas, the radiation frequencies ranging from 0.3 to 2.4 THz, the
emission power of ~30 μW/mesa and the radiation linewidth of 0.2 GHz at ~0.5 THz have been
obtained so far. We will show a brief overview of the development of the IJJ-THz emitters in our group.
About the Speaker
Takanari Kashiwagi received his Ph. D. from Osaka University in Physics in 2008.
After a postdoctoral fellowship at Osaka University (2008–2009), Assistant
Professor of Institute of Materials Science, University of Tsukuba (2009–2014),
then Lecturer of Graduate School of Pure & Applied Sciences, University of
Tsukuba (2015-).[Talk I3]
Magnetization Dynamics Features in the SFS Josephson Junction
Yury Shukrinov1,2, Ilhom Rahmonov1,3, Andre E. Botha4, Andrej Plecenik5, Dragos Angel6
1
Bogoliubov Lab. of Theoretical Physics Joint Institute for Nuclear Research Dubna, Moscow Region, Russia
2
Dubna State University Dubna, Moscow Region, Russia
3
Umarov Physical Technical Institute Tjik Academy of Science Dushanbe, Tajikistan
4
Department of Physics Unisa Science Campus University of South Africa Johannesburg 1710 South Africa
5
Department of Experimental Physics Comenius University in Bratislava Bratislava, Slovakia
6
Department of Theoretical Physics Horia Hulubei National Institute of Physics and Nuclear Engineering
Bucharest - Magurele, Romania
We investigate the φ0 Josephson junction, which demonstrates a rich variety of dynamical states
determined by the parameters of the Josephson junction and intermediate ferromagnetic layer, as
well as by the value of the dc-bias current. Results of magnetization dynamics simulation at fixed value
of bias current and results of FFT analysis are presented. We discuss how the superconducting current
interacts with the different magnetization components.
About the Speaker
Yury M. Shukrinov is a leading scientists of the Joint Institute for Nuclear
Research, Dubna and professor of University Dubna, Russia. He had his PhD on
Low Temperature Physics and Cryogenic Technique from Moscow State
University in 1981. His PhD project was devoted to the band structure and the
interband transitions in the semiconducting allows Bi-Sb. Today his research
interests are concentrated on the condensed matter physics and theory of
superconductivity, particularly, superconducting electronics, tunneling in
superconducting structures and intrinsic Josephson effect. He had his second
degree of Doctor of Sciences from Bogoliubov Laboratory of Theoretical Physics,
Joint Institute for Nuclear Research in 2014 on collective dynamics of coupled Josephson junctions in
layered superconductors. He is coauthor more than 150 scientific publications. Yu. M. Shukrinov was
a member of the organizing committee and invited speaker of different international conferences.[Talk I4]
Stacked Intrinsic Josephson Junction Bi2Sr2CaCu2O8 Terahertz Sources:
Design Issues for Achieving High Power Output Close to Tc
Timothy M Benseman1, Karen Kihlstrom1, Alexei Koshelev2, Ulrich Welp2, Wai-Kwong Kwok2,
Kazuo Kadowaki3
1
Department of Physics CUNY Queens College New York, U.S.A.
2
Materials Science Division Argonne National Laboratory Lemont, U.S.A.
3
Institute for Materials Science University of Tsukuba Tsukuba, Japan
The high-temperature superconductor Bi2Sr2CaCu2O8+δ contains stacked 'intrinsic' Josephson
junctions, with unrivaled packing density and a high superconducting gap energy. Cuboid 'mesa'
devices constructed from this material are consequently a promising technology for coherent,
continuous-wave radiation in the 'terahertz gap' range, spanning from approximately 0.3 - 1.5 THz. A
key issue for practical applications of such devices is their cryocooling requirements, and it is therefore
highly desirable to optimize their performance at temperatures that can be achieved by nitrogen
cryogenics. Here we report generation of 0.13 milliwatts of coherent emission power at 0.461 THz, at
a bath temperature of 77.4 Kelvin. This was achieved by exciting the (3, 0) cavity mode of a stack
containing 579 junctions, and with Tc of 86.5 Kelvin. In order to minimize self-heating, the THz source
was mounted on a copper substrate using PbSn solder. We will discuss the choice of mesa dimensions
and cavity mode, and implications for the design of devices which are intended to operate close to
the material's superconducting critical temperature. Funding Acknowledgement: This research is
supported by PSC-CUNY Award 60792-00-48; and by the US Department of Energy, Office of Sciences,
Materials Sciences and Engineering Division.
About the Speaker
Timothy Benseman is an Assistant Professor in the Department of Physics at
Queens College of the City University of New York. His present research
primarily focuses on terahertz laser sources based on stacked 'intrinsic'
Josephson junctions in the high-temperature superconductor Bi2Sr2CaCu2O8+δ,
as well as on the fundamental physics of this material. He previously
completed postdoctoral appointments at Argonne National Laboratory in the
group of Dr Wai-Kwong Kwok, and at the University of Cambridge, in the group
of Professor John Cooper. He received his PhD from the University of
Cambridge, and also completed an MSc in the group of Professor Jeff Tallon
at Victoria University of Wellington in New Zealand.[Talk I5]
Guiding of Terahertz Photons in Superconducting Nano-Circuits
Samane Kalhor1, Majid Ghanaatshoar1, and Kaveh Delfanazari2,3
1
Laser and Plasma Research Institute, Shahid Beheshti University, G.C., Evin 1983969411 Tehran, Iran
2
James Watt School of Engineering, University of Glasgow, Glasgow G12 8QQ,UK
3
Department of Engineering & Cavendish Laboratory, University of Cambridge, Cambridge CB3 0FA, UK
The field of plasmonic, as one of the fascinating areas of photonics, has received great attention for
its capability of deep subwavelength confinement. We present a nanoscale plasmonic slot waveguide
based on high transition temperature (Tc) superconductor Bi2Sr2CaCu2O8+δ (BSCCO). The effect of
geometrical parameters on the modal properties of the BSCCO plasmonic slot waveguide and the
thermal tuning of the modal properties of the waveguide are explored. The results indicate the rising
of temperature results in increasing the mode effective refractive index in exchange for decreasing
the propagation length of surface plasmon polaritons (SPPs). Our proposed plasmonic waveguide
paves the way for the development of the BSCCO based THz photonic integrated circuity at the
nanoscale.
About the STD20 Organiser
Kaveh Delfanazari (Senior member, IEEE) is an Assistant Professor
(University Lecturer) in Electronic and Nanoscale Engineering, at the James
Watt School of Engineering, University of Glasgow, UK, and an affiliate
Senior Research Scientist at the University of Cambridge, UK. He has held
positions as a Research Associate in quantum devices and circuits at the
University of Cambridge, UK, Research Fellow, and Project Leader in
superconducting and quantum metamaterials, at the University of
Southampton, UK. He investigated integrated superconducting terahertz
(THz) emitters and antennas- based on Josephson effect- during his PhD
work at the University of Tsukuba, Japan. Delfanazari's research group aims
at developing on-chip quantum light sources, RF/microwave/mm-
waves/THz electronic/photonic integrated circuits, and robust quantum chips based on (hybrid)
quantum materials for applications in secure communication systems and decoherence-free
(topological) quantum processing and computing.You can also read
